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Finding the Fourth Proportional to 139,212.54, 208,851.21 and 60,334.74

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Solution

The fourth proportional to 139,212.54, 208,851.21 and 60,334.74 is: 90,516.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,212.54 : 208,851.21 = 60,334.74 : x
  2. Step 2: Convert to fraction form
    139,212.54/208,851.21 = 60,334.74/x
  3. Step 3: Cross multiply
    139,212.54x = 208,851.21 × 60,334.74
  4. Step 4: Simplify right side
    139,212.54x = 12,600,983,454.04
  5. Step 5: Solve for x
    x = 12,600,983,454.04/139,212.54
  6. Step 6: Final answer
    x = 90,516.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.